try just takes all arguments to a method an passes them along, including blocks
:)
On Thursday, 14 June 2012 at 11:06 AM, Steve Hoeksema wrote:
> Aha! Didn't realise try could take a block. Thanks!
>
> On Thursday, 14 June 2012 at 1:04 PM, Ryan Bigg wrote:
>
> > You can use Object#try from ActiveSupport to do this:
> >
> > "hello".try(:tap) { |a| puts "yielded #{a.inspect}" }
> > nil.try(:tap) { |a| puts "yielded #{a.inspect}" }
> >
> > try will attempt a method, but only if it's called on an object that's not
> > nil.
> >
> >
> > On Thursday, 14 June 2012 at 11:01 AM, Steve H wrote:
> >
> > > I'm looking for something built-in to Ruby that works kind of like
> > > Object#tap, but only yields if self is not nil.
> > >
> > > That is, can I do this without monkey-patching Object?
> > >
> > > If it's in Activesupport that's fine too. I feel like this method exists
> > > but I can't find it.
> > >
> > > class Object
> > > def tap_unless_nil
> > > if nil?
> > > nil
> > > else
> > > yield self
> > > end
> > > end
> > > end
> > >
> > > "hello".tap_unless_nil{ |a| puts "yielded #{a.inspect}" }
> > > nil.tap_unless_nil{ |a| puts "yielded #{a.inspect}" }
> > >
> > >
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